docs: def content_type(self, content_type_id, query=None):
          """Fetches a Content Type by ID.
  
          API Reference: https://www.contentful.com/developers/docs/references/content-delivery-api/#/reference/content-types/content-type/get-a-single-content-type
  
          :param content_type_id: The ID of the target Content Type.
          :param query: (optional) Dict with API options.
          :return: :class:`ContentType <contentful.content_type.ContentType>` object.
          :rtype: contentful.content_type.ContentType
  
          Usage:
              >>> cat_content_type = client.content_type('cat')
              <ContentType[Cat] id='cat'>
          """
  
          return self._get(
              self.environment_url(
                  '/content_types/{0}'.format(content_type_id)
              ),
              query
          )